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Finding the Fourth Proportional to 18,521, 25,558.98 and 10,137.50

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Solution

The fourth proportional to 18,521, 25,558.98 and 10,137.50 is: 13,989.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,521 : 25,558.98 = 10,137.50 : x
  2. Step 2: Convert to fraction form
    18,521/25,558.98 = 10,137.50/x
  3. Step 3: Cross multiply
    18,521x = 25,558.98 × 10,137.50
  4. Step 4: Simplify right side
    18,521x = 259,104,159.75
  5. Step 5: Solve for x
    x = 259,104,159.75/18,521
  6. Step 6: Final answer
    x = 13,989.75

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.